4.7 Loved by 35,000+ Guys

Real Customers. Real Comfort.

The best undershirt is the one you forget you’re wearing. But don’t just take our word for it – see what the experts and our customers have to say.

I wear deep V undershirts most days with a few buttons undone. The beige is way less visible than my old white Tommy John. Size large fits perfectly.

Andy-D.-Review
Andy D.

Verified Buyer

I tried a wide range of brands before finding UnderFit. Now my drawer’s full of crew and v-necks I wear year-round. Comfortable in NYC’s freezing winters or sweltering summers. I won’t wear anything else.

James-B.C.-Review
James B.C.

Verified Buyer

I used to wear Thompson Tee, but UnderFit’s darker beige hides better under a white dress shirt. Wore it on my wedding day — looked great, felt great, and gave me the confidence to enjoy every moment.

Tristan-Z.-Review
Tristan Z.

Verified Buyer

Hands down, these are the best undershirts I have found. They are soft, comfortable, and most importantly they don’t show with my dress shirts.

Christopher-S.-Review
Christopher S.

Verified Buyer

Customer Reviews
4.7 Based on 683 Reviews
5 ★
82% 
558
4 ★
11% 
72
3 ★
3% 
23
2 ★
1% 
5
1 ★
3% 
25
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JD
02/23/2026
Jordan D.
US US

Exceeds Expectations

I am 6’ 1” and move around for my work but I hate when my undershirt is too short or comes untucked. So I ordered the Tall and it 100% stays tucked in. I waited a week to post this just to be sure. Not only does it stay tucked in, it doesn’t smell. Every undershirt I have had in the past from other stores would smell pungent in the armpits by the end of the day. Not sure what wizardry this is, but I sniff the armpits and these don’t. Furthermore, my underwear (sorry) used to creep up above my pant line throughout the day but no longer (or butt no longer). Everything stays put. I feel incredibly comfortable and much more confident in my looks. My mind is blown by this. Tall enough for me, not smelly, and keeps everything tidy. I am beyond pleased and will definitely order more. I feel amazing every day. - Jordan D.

UnderFit  Review
BS
02/22/2026
Billy S.
US US

Great fit!

Love the shirts, I’ve been looking for years for something that doesn’t make me look 5 pounds heavier and these lightweight and very breathable shirts are perfect. Five stars and would recommend!

GR
02/20/2026
Gilbert R.
US US

Great shirts

I ordered 4 t-shirts and got them in a few days. I have gotten them before and love the fit and fabric. Plus they outlast the major brand shirts I have.

TM
02/18/2026
Tom M.
US US

Fit good, do not know how they will wear long term. To be seen

EB
02/18/2026
EUGENE B.
US US

Great product

My first purchase from Underfit was for the V-neck undershirt. I love the way the product fits and feels. Will definitely look to Underfit for future purchases.

The Best Fit or Your Money Back

Every UnderFit undershirt comes with a 365-day risk-free trial. If it’s not the best undershirt you’ve ever worn, we’ll make it right — no questions asked.

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